Finding the Fourth Proportional to 76,223.72, 105,210.96 and 49,365.20

Step by Step Solution

1. Step 1: Write the proportion equation
   76,223.72 : 105,210.96 = 49,365.20 : x
2. Step 2: Convert to fraction form
   76,223.72/105,210.96 = 49,365.20/x
3. Step 3: Cross multiply
   76,223.72x = 105,210.96 × 49,365.20
4. Step 4: Simplify right side
   76,223.72x = 5,193,760,082.59
5. Step 5: Solve for x
   x = 5,193,760,082.59/76,223.72
6. Step 6: Final answer
   x = 68,138.37